Does anyone know what class I will have to run in? I'm kinda worried the y-pipe will make me have to run prepared class. Anyone know? Or should I just keep it a secret? Thanks

 

The only mods allowed in stock class are tires and shocks (if i remember correctly). You can run in STS with exhaust modifications though. But, depending on your region and how many cry babies you have... you can probably run a y-pipe on stock muffler and resonator and get away with being in stock.